Try turning your bluetooth off on your iPhone.
I just found some info from here: http://weblooks.ch/extern_/cydia/webe-plus/
WeBe++ is based on BTstack, an open-source Bluetooth stack. BTstack cannot run in parallel to Apple's Bluetooth. Therefore, WeBe++ has to turn off Apple's Bluetooth. You can re-enable Apple's only after quitting the WeBe++ app. Instead you can use the WeBe Server to use it via WiFi (or Apple's Bluetooth => needs Tethering).