I am afraid you are using Flashchat from Flashcoms.So we couldn't give support to you for this issue.
We are Topcmm and we are aproducing 123flashchat,123livehelp,123webmessenger.
Flashcoms and Topcmm are both software companies that comitted to communication softwares.
And if you are interested in our product ,you could try to download our demo version at "
www.123flashchat.com/download.html" and install it.As far as know,we haven't occured such problem so far.