Problems getting Acrobat to work right

I added Acrobat 5.0.5 a while ago, but 4.0 comes up when I access files on websites. I can't figure out how to prevent that. I manually entered 5.0.5 in netscape and mozilla, but it doesn't work. If I uninstall 4.0 will I lose the ability to create pdf files? Any thoughts? Using SuSE 8.0 with KDE 3.0.3. Thanks, Tom