works here in testing:
Changing to new remote directory for webcamfile C:\wdisplayprogram\Test.jpg
CWD /webcamtest/
250 CWD command successful
PASV
227 Entering Passive Mode (82,165,129,78,252,233).
STOR Test.jpg
150 Opening BINARY mode data connection for Test.jpg
226 Transfer complete
Changing back to original dir for this file
CWD /test/
250 CWD command successful
post a screen shot of your web cam upload settings?