Mod edit: If you submit a report, please do not follow up by posting "REPORTED" or any variation thereof. It's a form of spam, and only serves to initiate hostilities. Thanks!
You need to run the same version of the client that you are with your sever. (ie. if your on server is on 1.5.01 then your client need to be on 1.5.01)
0
0
0
0
0
0
0
Mod edit: If you submit a report, please do not follow up by posting "REPORTED" or any variation thereof. It's a form of spam, and only serves to initiate hostilities. Thanks!
0
0
0
0
0
0
0
0
Try Reinstalling Minecraft, by following this Tutorial.