urgent: intalling Iisproxy module

Dear all

i downloded copied the file into c:\inetpub\scripts(like Iisproxy.dll, Iisproxy.pdb and IisProxy.xml)

in the ISAPI Filters tab..i added name "Iisproxy" and assigned the path i.e, c:\inetpub\scripts

Created a virtual directory called "scripts" assigned the path like c:\inetpub\scripts. assign the permissions Read and run scripts...etc

opend the Properties of "Scripts" -> virtual directory tab...

already application has come by default called "scripts" and choosed the "configaration"

i clicked on ADD button...it shows me all checkboxes and text areas like Executable..

extension

verbs

script engine..

but the "OK" is disabled...can anybody please tell me y it is disabled...

I'm using IIS 5.1 ....IisProxy module 6.1

pl help me

regards

PRadeep