Trouble using remote access and quickbooks

My accountant has constantly had issues trying to use LogMeIn and my Quickbooks to do my taxes.  I have made sure she has my LogMeIn user name and password; the computer username and password plus the Quickbooks password.  She has always had issues with LogMeIn actually letting her in to work.  She has yelled at me that it's my fault, but I have not changed passwords or user names.  Are you able to help me?  I dread tax season specifically because of having to deal with this.