KeyerrDescrMAFLogonError occurs when using SAP IT Approval

Dear Solman App Developers,

I got the error "KeyerrDescrMAFLogon Error" when using SAP IT Change Approval on my Iphone 4s with iso 7.

the Service URI is available in SAP Corportate network.

http://10.66.190.170:50001/sap/opu/odata/AIGW/SERVICE_GDAPI/?$format=xml

User: ZHUBR

Password: Brian123

Could you possibly take a look at this?

regards,

Yueqiang