In the debug console, type
getblockcount. This will tell you the newest block in your wallet. Then type
getblockhash followed by that block number.
Now visit the COLX Blockchain Explorer and search for that same block number. The blockhash displayed should match the hash from your console:
If it matches, you are good to go.
If it does not match, the best way to resolve this is by following the ColossusXT In-Wallet Bootstrap Guide.