[ubuntu-uk] repository screwup!!!

[STONE COLD]

hi, 
i need some help. I accidentaly deleted some repositories and now im getting this error message.. and a constant little red box on the top toolbar ( informing me of an error). here is the error message:

E: Type ‘/etc/apt/sources.list’ is not known on line 30 in source list /etc/apt/sources.list
E: The list of sources could not be read.
Go to the repository dialogue to correct the problem.
E: Type ‘/etc/apt/sources.list’ is not known on line 30 in source list /etc/apt/sources.list
E: Unable to lock the list directory

I have no idea what this means..i got this after putting "/etc/apt/sources.list" in repostories, add , custom. I put in there...no idea what it means! Please help!!!

regards 
javad