Unable to capture SAML response

Hi Team,

I am trying script SSO application and tried to capture SAML responses in the script but no luck. its throwing No Match found.
I tried to use below
1) LB=<INPUT TYPE="hidden" NAME="SAMLResponse" VALUE="
RB = "/>
2) <INPUT TYPE="hidden" NAME="SAMLResponse"
VALUE="(.*?)"/>

Could you please help me out here