No space between stratum + tcp: //pool.bitsum.uz: 3333 ---->stratum+tcp://pool.bitsum.uz:3333
And try to add other option : -allpools 1

stratum + tcp: //pool.bitsum.uz: 3333 -u wallet
-allpools 1 stratum + tcp: //pool.bitsum.uz: 3333 ?
NsGpuCNMiner.exe -o stratum+tcp://pool.uz:3333 -u sm2zGCxxxxxxxxxxxxxxxxxxxxxxxxxxxx -p x -allpools 1
Be careful of spaces in your command line. Copy/past this command line and write your complete address wallet.