High vitamin b12 - I have 1.5 times the normal level of b12 I should have says doctors I have ms?

Having high levels of either B12 or Folates is a strong indication that one may have MTHFR mutations and can not properly metabolize synthetic Cynocobalamin or Folic Acid. If you switch to the methyl forms (Methylcobalamin & Methylfolate), you may do much better. If you have high Folate levels, then you may need to not only stop supplements with Folic Acid in them, but try to reduce the amount of Folic Acid you may be getting from processed foods in your diet.

There seems to be a significant association between MS and disturbed vitamin B12 metabolism. Vitamin B12 deficiency is often observed in MS patients (not high levels as is the case with you).

See: http://www.ncbi.nlm.nih.gov/pubmed/1430153