Running Applets in IE

HI,
If there are any Java gurus out there, I was wondering why my applet will run fine in Netscape 4.74, but will not in IE 5.5.
The applet appears in IE 5.5, but none of the events (e.g. click of the buttons) fire the actions or methods (i.e. no functionality). Any help is greatly appreciated as I am a Java newbie. Note: the applet and all of its associated classes were created with Visual Age.
Dan

Also the applet has a connection to an IBM DB2 database via JDBC. Again, it is connecting to the database fine in Netscape, but not in IE.