First of all UNINSTALL and DELETE all that you have in your pc related to SILKROAD.
Go at the official joymax page.
Login with an account - go at the download tab - download from there the silkroad install client, and the patch (there is also a patch) download both...its like 1 file of 2-3 GB and the other one , the patch has like 20-50 mb...
You ll find`em both in the download section on joymax.com
After installing silkroad, open it and it will ask for the patch.
Open patch - wait `till its done and there you go...you have a playable silkroad version in your pc , again