cgi error

The specified CGI application misbehaved by not returning a complete set of HTTP headers. The headers it did return are: This message is starting to show when I change the name of home directory. I change the local path in IIS but nothing. When I return the name everything is ok. I created new site and copy all of the pages but php pages still won't work and it's the same message. What is the problem??. ( I try to change security, and php work fine on the other site, restarting IIS and service from control panel but still nothing)