well i used the method of blocking these applications
ISa server management console.... client setting
firewall client's application setting
Name == Kaaza Key Disabled Value 1
this worked for me for quite some time but now a user told me that he changed that value to 0 from hi firewall client...this is the strangest thing i ever heard that by modifying his firewall client he is able to bypass ISA ..becoz before this these softwares stopped working when i disabled them
Can u tell me how ?