Blacklist block action change unexpectedly (busy tone became caller hear ring once and divert to voicemail)

What steps will reproduce the problem?
1. Enable blacklist with busy signal 
2. Run memory manager hd to claim unused memory
3.

What is the expected output? What do you see instead?
Blocked Incoming call to be hearing busy tone instead hearing ringing once and 
then divert to voicemail

What version of the product are you using? On what operating system?
kuaildial 0.2.4 beta2
iOS 5.0.1 (9a405)
Memory manager hd ver1.2

Please provide any additional information below.

Original issue reported on code.google.com by leeka...@gmail.com on 1 Mar 2012 at 3:35

Chen1in / kuaidial

Blacklist block action change unexpectedly (busy tone became caller hear ring once and divert to voicemail) #213