freddie

I have a gaf of 50 and this is giving me a 50% pension my rating was done in 1997 with a previous one in 1995 and at that time the doc said i was bipolar then changed his mind and said alcoholism and depression in 97 the doc disagreed and said that was wrong and i had lived under this miss diagnosis i am now fighting my case once again with a current gaf of 50 can i expect an increase? i have only been able to work sporactically for 12 years i have also spent 5 and 1/2 years in an alternative treatment program the va has documentation for 3 and 1/2 years so what i am asking is will i get this case won? can you help me? thank you freddie