Displaying WebI report parts via openDocument in BI 4.1 SP 3 Update

1) We are using SAP BO 4.1 SP3 Update version.

2) We have a requirement to display PARTS of webi report which has prompts as well.

3) We referred the Opendocument PDF and used the below functionality to get what we need:

sRefresh=Y&mode=part&sReportPart=UIREF:RID=1:BID=1

The problem with this is we have a Prompt X which has a value say  A B C.

So our final URL would be:

http://[servername]:[port]/BOE/OpenDocument/opendoc/openDocument.jsp?sIDType=CUID&iDocID=[CUID of WebI doc]&lsSX=A B C&mode=part&sReportPart=[Reference to the report part to be shown].

4) Our problem is that if we pass parameters in Prompt X which has a SPACE (Like we have in A B C) the functionality goes for a toss. Also if we pass Dates like 01/01/2012-12/31/2012, the function doesnt work.

5) This is the problem with VIEWING PARTS OF WEBI report only. Works fine if we wanna view full report.

6) Is it a known issue ?