Can you provide the sha256 hash and file size of the bootstrap.dat file you're trying to use?
3D45796F2AEF6FD665B974C81859B51E6869BB17E803EBBA322794E87BC4B097
size - 3 265 405 kb
I just created a new copy of the bootstrap.dat for blocks 0 through 2654600 from an independent CLAM node. It has the same sha256 hash as your copy, so I'm sure your copy is correct.
I don't know what the problem could be here. Are you putting the bootstrap.dat file into the correct folder with the correct name? It should go in the same folder as your CLAM wallet.dat file, and be called bootstrap.dat all in lower case.
Did anyone else try syncing the blockchain recently using this bootstrap.dat file? Did it work for you?