Can't see the bottom of twitter widget


Dear Sirs,

Could you, please, help with the following…

I load Twitter widget (tweets) on
Block is on the right side, third blue label “Twitter”.
Screen attached:

Twitter widget loaded in hidden div.

The problem is: when I click on label “Twitter” (on the right side of the site), I don’t see the bottom of the widget (whith “Load more” and “tweet to” options).
Browser: Firefox.

Can anybody help to fix it.

Best regards,