Thanks for your answer, i'm using the latest Guiminer Scrypt availible, don't know which version of cgminer is included, and its running usually great at other pools. Also with burnside, but not all the time. Here you can see the difference:

https://dl.dropboxusercontent.com/u/15925047/burnoz.JPG https://dl.dropboxusercontent.com/u/15925047/Burnside.JPG https://dl.dropboxusercontent.com/u/15925047/ozcoin.JPG

Both run with identical settings. 

Do you think OC could be the problem that one pool works, another not?

I just don't understand why it sometimes works great, but then it just stops without any change on my side. On both PC!

I tried to include the latest cgminer in guiminer as explained on the guiminer@bitcointalk mainpage, but this didn't work.

I'd like to stick with burnside, when it works i have the feeling it runs much better than other pools and i hope somehow i can get it solved...


Thanks in advance...