Weird glitch when crafting a computer

I'm honestly not sure if I should be asking this in the ComputerCraft Forums or the Forge forums. The behavior I'm seeing is that I can craft vanilla items just fine. When I try to craft a computer, the item appears in the output tray, but when I try to pick it up, I can only drag it for a fraction of a second before it glitches back to the tray. Ditto if I shift-click. The computer appears in my inventory, but then immediately glitches back.
Here are my versions
MineCraft 1.7.10
MCP V9.05
FML v7.10.99.99
Minecraft Forge 10.13.4.1448
Minecraft Coder Pack 9.09
ComputerCraft 1.74

Is this a single player game, or are you playing on a server? If the latter, did you install ComputerCraft on the server as well?

Thanks for the quick reply.

This is playing on a forge server. I saw that there's a newer version for minecraft 1.8, so I went ahead and downloaded the forge server for 1.8 (1.8-11-14-4-1563), then the computercraft 1.76 jar and put it in the mods folder.

I created a new local instance on MultiMC on my other computer with minecraft 1.8 and the same forge and computercraft versions. I'm still getting the same behavior.

Perhaps more importantly, I'm not seeing any verbiage in the startup output on the server that it's finding or loading the mod.

So the TL:DR version is no, I don't think my server is running ComputerCraft. It's been long enough since the last time I installed it that I must have missed an important (but not obvious in the instructions I've found) step.

It would be helpful to post the log from the server. If it's not loading the mod, we should see evidence of that in the log.

are you running the forge-1.8-11.14.4.1577-universal.jar or the minecraft_server.jar?
For mods you have to run the first. And to some server gui lag create a file named start.bat with the content:

@echo off
pushd %~dp0
java -XX:+UseG1GC -jar forge-1.8-11.14.4.1577-universal.jar nogui
pause
popd

And than start your server over that file.

Here's the log from the latest server start. as yoiu can see there's no evidence it's finding the mod file. I'm stumped.

[17:23:17] [Server thread/INFO]: Starting minecraft server version 1.8
[17:23:17] [Server thread/INFO]: Loading properties
[17:23:17] [Server thread/INFO]: Default game type: SURVIVAL
[17:23:17] [Server thread/INFO]: Generating keypair
[17:23:18] [Server thread/INFO]: Starting Minecraft server on *:25565
[17:23:18] [Server thread/INFO]: Preparing level "world"
[17:23:18] [Server thread/INFO]: Preparing start region for level 0
[17:23:19] [Server thread/INFO]: Preparing spawn area: 7%
[17:23:20] [Server thread/INFO]: Preparing spawn area: 12%
[17:23:21] [Server thread/INFO]: Preparing spawn area: 18%
[17:23:22] [Server thread/INFO]: Preparing spawn area: 23%
[17:23:23] [Server thread/INFO]: Preparing spawn area: 27%
[17:23:24] [Server thread/INFO]: Preparing spawn area: 32%
[17:23:25] [Server thread/INFO]: Preparing spawn area: 37%
[17:23:26] [Server thread/INFO]: Preparing spawn area: 41%
[17:23:27] [Server thread/INFO]: Preparing spawn area: 46%
[17:23:28] [Server thread/INFO]: Preparing spawn area: 51%
[17:23:29] [Server thread/INFO]: Preparing spawn area: 55%
[17:23:30] [Server thread/INFO]: Preparing spawn area: 60%
[17:23:31] [Server thread/INFO]: Preparing spawn area: 64%
[17:23:32] [Server thread/INFO]: Preparing spawn area: 69%
[17:23:33] [Server thread/INFO]: Preparing spawn area: 72%
[17:23:34] [Server thread/INFO]: Preparing spawn area: 77%
[17:23:35] [Server thread/INFO]: Preparing spawn area: 81%
[17:23:37] [Server thread/INFO]: Preparing spawn area: 86%
[17:23:38] [Server thread/INFO]: Preparing spawn area: 90%
[17:23:39] [Server thread/INFO]: Preparing spawn area: 95%
[17:23:40] [Server thread/INFO]: Preparing spawn area: 98%
[17:23:40] [Server thread/INFO]: Done (22.295s)! For help, type "help" or "?"

You don't have forge installed…

Derp.

Sure enough. I was running the wrong jar from the batch file.

Thanks!