Getting "error reading response" for some reports

I am using jaspermobile latest version on Ipad 3.

I connected to the jasper reports community server through jaspermobile successfully

1)when I try to run the reports that I have deployed onto  jasper repors server, for some reports , I am getting "error reading response" but some reports are running fine 

2) when I run on safari browser, all the reports are running fine

3) drill down hyperlink not getting shown from jasper mobile, the fields are just stale.

1)  jaspermobile v : 1.2.1

2) jasper server v : 4.7.1 (community)

observation : for reports having input parameters/control values displayed on the reports and for reports having input parameter to take '%' as input ; this issue is happening.

Please help.