I badly understand you. You can not find OEP?
Try to make something such as it.
-It is necessary to remember value ESP on EP in DLL.
-Then to put "bpx GetProcAddress"
or "bpx (GetProcAddress+3)"(on especially spiteful protectors)
and press "F5".
-When will stop do it "bc *"
-Then to put "bpr esp-4 esp+4"(if you in win98) or
bpm esp-4
bpm esp-3
bpm esp-2
bpm esp-1 (if you in win2k/XP).