using crystal report with asp.net


1)i need to creat e report with a parameter , the value of which will be passed from front end
i have created a report & a parameter & passing value but when i execute i get a page where in again ia m asked for the parameter value & even after enetr teh value i get msg parameter not supplied

2) i need to create a forumla based on the paramater value
if param value="R"
field1 shld be dsiplayed
else
field2

3) when i view the report from IE the icons are not visible & when viewd in FF i get

submit query submit query submit query submit query submit query submit query 1 / 1 submit query submit query

4) i am creating mailing labels & wish to display the address based on the above paramter condition but not able to do it