having issues with my door locks on my 240sx

[dsastr_clan]

hey guys i need help with my door locks and it totally sucks!! cuz i was never able to unlock my doors with my key, i was able to unlock them with the remote control from the after market alarm, well my doors lock and they dont unlock i can lock them with the remote control or with the lock in the car but they wont ever unlock!!! and i learned this the suckie way few months ago when i had to spend 50 bucks on a locksmith to open my car so now everywhere to go i have to leave my car unlocked and it suxs so bad please anybody help me ?? how can i fix this. thank u guys