I'll try to be gentle here...

No matter what tool you use, the results will be the same. The network stack is responding per RFC. If it receives an unsolicited SYN/ACK, the appropriate response is RST. Period. For an example of this, take a look at an idle scan in NMAP.

So, you're problem isn't the tool you're using, the problem is how you're executing your test.

PS
HPING rox da house when used properly.