Asterisk to Huawei SoftX3000 V300R010

I need an expert to help me diagnose and find out reason why i have problem sending calls to my provider. My provider uses Huawei SoftX3000 V300R010. initially i have problem even to log in to Huawei SoftX3000 V300R010 but now my accounts are logged in. problem is, i am getting very low ASR and low ACD. calls seems very hard to get connected, always experience circuit busy and others. But when uses a softphone, ASR is high. need an expert to help me diagnose asterisk SIP log file and possibily suggest a solution. current setup, Centos 5.0 Asterisk 1.4.29 Thanks