I have seen the picture, yes. And the problem is in topic.asp, yes. Looks like you've messed up something when you've installed a MOD. Double check the modifications you've done as stated in the readme file that came with the MOD(s).
ClanSnT, please stay calm. OneWayMule asked you a very normal question seeing how you provided little to no information about your forums.
If you installed those MODs one at a time, and tested the forums each time after you added a MOD, you can be sure the Poll MOD is the culprit since you added this MOD last. If you made backups of your files before you added each MOD, you can open the backup of topic.asp from before you added the Poll MOD and re-add the MOD (check everything twice to make sure it gets added correctly this time). If you didn't make any backups, you'll have to open your current topic.asp and go through the Poll MOD's readme file to check every change you've made and make sure you did it right.
FrutZle i have made backups on my files. I upload topic.asp (from backups files) and i dont have problem... ...i re-add the last MOD (Poll MOD) in topic.asp (from baskups files) and i upload in the FORUM files, but again same problem I dont know what is the problem ?!?