Why don't you post the full commandline you are using, and the output you are getting, and maybe someone can spot something off?
Microsoft Windows [Version 6.1.7601]
Copyright (c) 2009 Microsoft Corporation. All rights reserved.
C:\Windows\System32>cd ..
C:\Windows>cd ..
C:\>cd Users\office\Desktop\New folder\quark-v2_w64.zip\quark-v2_w64
The system cannot find the path specified.
C:\>cd Users\office\Desktop\New folder\quark-v2_w64\quark-v2_w64
C:\Users\office\Desktop\New folder\quark-v2_w64\quark-v2_w64>minerd64_sse4.exe -
a quark -o stratum+tcp://src.coinmine.pl:6020 -u worker_Izuxxx.1 -p xx
[2013-09-04 16:57:53] 2 miner threads started, using 'quark' algorithm.
[2013-09-04 16:57:53] Binding thread 0 to cpu 0
[2013-09-04 16:57:53] Starting Stratum on stratum+tcp://src.coinmine.pl:6020
[2013-09-04 16:57:53] Binding thread 1 to cpu 1
[2013-09-04 16:57:54] Stratum authentication failed
[2013-09-04 16:57:54] ...retry after 30 seconds
Ok, whats my problem?...lol THX!!