MPLS + OSPF Problem

gentlemen,

I have the following problem 15 mikrotiks network using OSPF, MPLS however like to put in only 4 of them. More when I do that I can browse any site (browser) and not WinBox not open any of these 4 routers that are enabled with MPLS. What can I be doing wrong?

looks like MTU issue.

thanks that was it