MERGE function problem with Ancestry.com and Family Tree Maker?

I started having problems with my merge function in the search results details, whereby it is disabled and will not merge information into a person in my tree. Ancestry said that it was probably because of the critical operational patch that was downloaded at the end of May...Does anyone else have this problem? And how did you fix it? Ancestry suggested that I delete my program and reinstall it to see if that would help, and/or they told me to disable my Norton program...I don%26#039;t really know which way to go on this one, as they don%26#039;t either! Any HELP???