Hi Vasanth,
Pls go through the below thread which provides answer for your 1st question:
http://scn.sap.com/thread/1298152
2. Pls check whether valid receivers are given in the receiver column or not. Also, ensure that you have values in value field of receiving tracing factor. Based on tracing factor - Value field only it will split the sender values and allocate to receivers in COPA.
Regards
Srinivas Salpala