Emergancy Please?

I am using windows 2000 Advanced Server and configure it as RAS Server for my clients to dial in. It was working properly, but when I installed ISA Server on it , ISA Server change the security policy of my system and after it my RAS server stop working(No modem ports are displaying in ports section of RRAS), all ports are displaying but when I want to configure my Modem as listening device for RRAS it shown an error message the ports can not be saved. I am too much worry please provide me helpas soon as possible.