Failed to install hook in client

[Deron]

Hi, I have a little problem with injection.

Every time i try to start injection an error occurs:
Patch failed, reason:
Failed to install hook in client
Reason: (87)

The problem is, that my shard have a special client and i don't know how to solve this problem. Here is the link for the client, if someone wants to test it
http://uploading.com/files/e3c2124e/endor.exe/