through Visual composer calling SAP R3 screen (iView)

in my senario i want to list down all purchase requision list after selecting perticuler record i need to call SAP R3 tcode ME52 in this t-code i want to skip first screen.

so i created two RFC for this one which is list down all purchase requision list and second RFC will call SAP R3 T-Code but while running this iview first RFC will run fine and display output in portal but second RFC is not able to call tcode at portal level but working fine in SAP R3 system.

i would just like to know weather it possible or not id possible then how

please guide me

Regrds,

Jignesh Patel