I have had a Slingbox classic for sometime now.  It works very well with my Sky+ box. It also works with my old Homechoice box, however, I am unable to get it to work properly with my Tiscali + box. Tiscali box connects find with the TV but when I try and connect it to the slingbox classic I get lots of interference.

Any suggestions as to what the cause of this problem may be bearing  in mind that all individual components of the setup appear to be working fine.

thanks in advance