Site-To-Site VPN does not work for one specific subnet

We are using Cisco 5500 series ASA for sites HQ and BX and there is a site-to-site vpn in between,

BX (subnet 192.168.6.0) can access to subnet 192.168.200.0 subnet at HQ but can’t access 192.168.0.0 subnet at HQ.

Packet trace shows us that the data is being transmitted to both sites but it drops. I can’t locate the source of the problem. I sense it is regarding routing but can’t point the problem.

I know that it is better for me to post the logs but I don’t know how. I need a hand on this, noobe here.

Thanks and happy new year.
K.