if you want to keep quickreply your issue may be a conflict with another cydia package. remember quickreply is essentially a pop up on the phone and there are plently of apps that you can download to prevent pop ups, the most popular being pop up blocker. I would suggest goin through your settings (including supreme preferences if you have it) and looking look for the program thats blocking it. Just uncheck anything thats says something like 'block SMS alerts' respring and it should be fine.
Hope this helps