I have scored 590 in MAT septmbr should i give again in decmbr or not ?

Dear Mr. Harsh, That depends upon which institute you consider for the admission. As score depends upon the cutoffs of the particular Institute that you select. I think you should take another chance.

Dear Student your score is valid for one year please go through score card and check the eligibility of institutes where you wish to apply whether they accept this score for academic year 2015-16