Why Yahoo do not respond to any of my copyright infringement claims?

Yahoo DMCA complaint problem

[newsphinx]

I run a travel-related website with rich content, all of which are copyrighted work by my team. While there are many thieves who stole my content and use it to make money!

I have spent some time to find out sevral major offenders and sent DMCA complaint to Google, Yahoo and MSN. Both Google and MSN have taken proper action on them and removed the infringing pages. While till now I've never got a word from Yahoo in the past half a year. So what's wrong with Yahoo copyright department, being bankrupted?

I'm sure I have followed all its instructions on how to submit a copyright complaint.

[Angonasec]

That is strange, I find the Yahoo Copyright team far quicker to respond to a properly filed DMCA than G or MSN.

Double check to ensure Y! have your hardcopy signature on their file.

[soapystar]

how much content was copied?....snippets or full pages?..text and/or pictures?