how to use the caseccading parameter in my ssrs report? with some scenioro?

Hi i have a complex report for that i am using the 3/4 parameters name list.

parm1:ProductId

parme2:manafacturer

pram3:productname

so here i will use these 3 paramters in my ssrs report .

so here i will create a casecading parameters using the above 3 parameters.

But here my requirement is..

1)for my user selcction select the paramater1  as ProductId based on the productID parameter the 2 nd 3 paramters

i want to display automatically without user selection

2),Here every productid have a single productName and single manfacturer

 and here i dnt need the drop down list of 2 nd 3rd parameter for user selection. i need only the text boxes

4)am alredy tried for this but i will able to see only one value in the user selection of param1.but it would not change for the second selection

5)can you give me some idea hw would i show u 2nd and 3rd parameteer based on 1st paramter value without drop down list for my user seletion of my first parametr1

I guess u understand my requirement.

can you suggest me any help .....for the above requirement.

ThanX!