As I see your situation, it really happened that some people when they undergo to finger pinting test, some were not able to pass this procedure. some reasons if you are ex-qatar and the cid is in doubt about your identity.. we have a case before that one of our worker almost one year already, whenever we send him to cid for finger print test, he always got a rejected result..
and suddenly he confessed that before he work in saudi arabia 5 years ago and he has a criminal case their. the cid detected that case thru GCC tracking system.
the cid decided to send him immediately deported to his home country..
with your case, if hands problem, your it should be cured first before you will undergo again..because the system will not be able to scan properly the lines in your hands.