virtuemart and jch optimize plugin

[kiasati]

Hi

I'm using jch optimize for my joomla site.

i set up jch plugin, then i saw some problems in loading images for example in my site.

when i exclude virtuemart's js files in jch, problems solve.

BUT then when a user clicks on "add to cart" button in product detail page, the item doesn't add to cart. cart opens (not in "www.farafan-market.ir/cart", but in "www.farafan-market.ir/ product-category") but the product doesn't add.
i know this happens becuz of the js files. but why this happens?

what should i do to configure jch and vm to work together well?