Hi, sure i'am using slush pool.

I have an Radeon 5870 card using with Phoenix 2.0 client, so this client is not stratum compatible, but no prob, as described on slush internet site, i can use proxy miner.
Proxy Miner ist accepting shares..but in my account settings on
http://mining.bitcoin.cz/ there is still the warning message about deprecated protocol and in list of worker -> stratum -> no
What's wrong ?
I'm not sure what's happening with your proxy, but you might want to try cgminer or bfgminer instead (then you don't need to run a proxy).
If that's too complex, I've heard good things about the bitminter web-based mining software.