Cannot get it to work with salt

[Billy]

I have been experimenting trying to find a password and salt I created but it never seems to work although it works fine with just the password.

I'm using the latest oclHashcat64.exe and HashcatGui as a front end.

I have created a sha1 hash of :

passtext = 80439F84D16111C24A7748F40B95F12696FB545B

and a salt of

foosalt = 666F6F73616C74

I create a hash.txt of:

80439F84D16111C24A7748F40B95F12696FB545B:666F6F73616C74

and use the hash type of sha1($pass,$salt)

but it just exhausts

If I do this without the salt 'SHA1' it works fine.

Am I missing something here?