Thank-you for contacting Slingbox Forum. I am sorry to hear you are having problems with viewing some of your Spanish channels.
If you have exhausted all resources to find a solution, then you may want to contact Sling Media Support in Spain. They may have more information about his issue. The number to call is (091) 375 4529.
The Contact Sling Media Support link is:
Have a great day!
Sling Moderation Team