Excel 2007 Data Import from txt files
 

I have about 73 pages of txt files that I am importing to one excel
spreadsheet. I love the 2007 ability to do this until my hickup. After page
29, some kind of security thing popped up along the tab bar, and it does not
allow me to import where I left off. The whole tab menu is not lit up when I
insert into the cell I want to import. Not only that, but if I start over it
only allows me to import once, and then the import tab does not light up
after the first import. I am certain it has to do with this security setting
or the connection thing but I don't understand how it works and can't find
the answer in the help. I can't seem to find how to change any of the
settings to make my import work again, and remember it worked fine for 29
pages. Can anyone help me.