Six Flags Discovery Kingdom Vallejo, CA?

i bought a six flags discovery kingdom seson pass for this year! I bought the seson pass 2 years ago also, but last time i bought it you could use ypur pass to get into WATERWORLD park in Concord Ca! i checked online and i coudnt fiind anything that answered my question!!!! i hope someone can hep i really love waterworl and would like to be able to attend both parks freely!!!!