Portal not able to access BSP application in ECC?

HI All,

We have a BSP application on our ECC system and we have hosted it on Portal using the BSP iView.

The ECC is behind the firewall and the Portal is available on internet.

Now when a user tries to access that BSP application through Portal it shows 'Page cant be displayed' page.

Please guide.

Regards,

Sumit Oberoi