Removed Sd card. Insert a new one error.. plzz help guys.hoe can I fix this?

[AC Question]

Removed Sd card. Insert a new one error... plzz help guys..

hey guys! i am new to this.. I have a 2gb microsd sd card... it is inserted in my phone properly but it say's removed sd card... I have a Maxx Genx Droid7.... My memory card is pretty old.. i Have tryed everything possible.. Cleaning,Formatting,Reseting... everything.. The sd card has been working well before in my phone... Should I buy a new one... plzz guys help me!! thanks..