hello i got a brand new smartech tiger 1:10 nitro and all it is it wont start i plug the glowstick in then pull the string and yeah i did put nitro stuff in I AM NEW please dont tell me all the complicated stuff other wise i wont know but when i try to pull it the string gets stuck and then you can hardly pull it why does this happen please help i only got it today and im dieing to have a go