content-repo greyed out

New content server, 11.2.2, Windows Server 2008 R2 Standard. I changed the location of the content-repo as per the instructions in 11SP2 System Administration Ref, section 14.1.1., to take advantage of a second drive for storage. Now, when I click on Take Image, and specify the server, the path in "Look In:" looks correct.. However, when I click on Directory Path on Server, everything is greyed out. It won't let me select the Content folder, nor navigate elsewhere at all. It throws an error saying I must choose an object or cancel. Manual taking and restoring of images works great. Any suggestions?? Thanks

JeffAK