Incredimail links

On another computer I have Incredimail, the free version, I have just recently upgraded to Windows 98. When I receive mail messages with links in them I cannot go to the links. I get an error message that says, "Windows cannot find PROGRAM.EXE. This file is needed for files of the type, url:hypertext transfer protocol." I'm thinking that Incredimail doesn't know to use Internet Explorer to open links. Am I right? If so, how do I tell Incredimail to go there? Under that error message there is also a dialog box with C:\ and 3 options below; OK, Cancel, and Locate. If I click Locate I get a 'Browse for folders' window that only shows me folders and not any files. In my C:\ directory I have this path that I think Incredimail needs to go to; C:\Program Files\Internet Explorer\IEXPLORE.EXE.
But, I don't know how to tell Incredimail to use IE to open links. Please help!!!!