Facebook problem at mikrotic

Hello

I have big problem before 2 month until know, i try every solution to solve it, but without any success result

Facebook website does not open on the mikrotic server, i have version 2.9.27
Overall, there are problems in Site Login
when i connect directly to the modem, no problem happen, but when i log in to mikrotic server via hotspot the facebook site know longer open.

When i try to delete all cookies and temp…etc, it open and u sign in and after that you cant do anything nothing response

i figure solution for this problem, but Unfortunately it open another problem to me .
I remove the mark from transparent proxy from user profile and it working very well and the facebook and other webmail site open well, but when you download any files from the internet you download speed only 7 K , i put the max speed and it still 7K
I realy dont know what to do.
Finally i format the server and setup it again, and i think that it will solve the problem but it still like before.

I am not active cache or web proxy, i don’t have any rule on firewall
any one can help?

Thanks

I want it like when i remove the mark from transparent proxy but with the true speed i submit for the users.