Can't work with specific Excel-Table with necessary Price List - Why?

Hello folks,

I have a sheet here, but for the first time, I can't even click into the cells.

Please, can somebody take a look and explain to me, why I can't work with the sent xls.-File?

It is a file which contains around 500 Products with their prices and other data.
I wanted to use the Vlookup-Function to take all the prices automatically, but I just can't click on any cell inside this sheet.

I am grateful for any help you could provide.

I attached the file I am speaking of here:
Pricelist-New---Copie.xls 3,9 MB
Sorry that I couldn't use the Forum File Upload, but I get the Errormessage, that the file is supposely too big. !?

kind regards,
George

it is password protected file.

Regards,
PRB.