okay im fixing my bikes BB, i thought i bought the correct replacement parts

what came off the bike was a Shimano FCM151 28/38/48 X 170mm Steel / Alloy Chainset and a 68/118 BB

what iv tried to put back on the bike is a 68/118 BB and a SHIMANO Acera FC-M361 Chainsets MTB 48x38x28T 170MM Black.

now the problem is that i can not get the dallier to drop to the smallest cog on the chain set (i think its hitting the frame). dose this mean i need long spindles on the BB if so how longer would i need? or have it just fitted it wrong


thank you for any help in advance