Help with my Cydia!

First of all, i must admit that i touched some sources file on the root directory. I delete them or something.

Next, upon refreshing data(updating sources), i get the following:

Error: Refreshing Data

GPG error: httpL//elpelle6.com ./Release: The following signatures were invalid: NODATA 1 NODATA 2

Failed to fetch
http://david.ashman.com/beta/ ./Packages.gz HTTP/1.1 404 Not Found

Failed to fetch
http://elpelle6.com/repo/ ./Packages.gz Sub-process gzip returned an error code (100)

Failed to fetch
http://apt.iphonemodding.com/ ./Packages.gz Sub-process gzip returned an error code (100)

Failed to fetch
httpL//cydia.xsellize.com/ ./Packages.gz HTTP/1.1 404 Not Found

Failed to fetch
http://cydia.hackulo.us/ ./Packages.gz HTTP/1.1 404 Not Found

Failed to fetch
http://cmdshft.ipwn.me/apt/ ./Packages.gz Sub-process gzip returned an error code (100)

Failed to fetch
httpL//www.sinfuliphonerepo.com/ ./Packages.gz HTTP/1.1 300 Multiple Choices

Some index files failed to download, they have been ignored, or old ones used instead.