Fax service picking up after SP4 update

I recently installed SP 4 on a 2000 machine and now the modem will always pick up any incoming phone calls as a fax. I have all the fax services turned off and the fax software is set NOT to pick up incoming calls. I even uninstalled SP4 but the problem is still there. Has anyone else run into this problem or no what I can do to fix it? Thanks in advance