Endnote keeps saying I don't have associated .DATA folder (even though I do)

I have Endnote X9 on both my work desktop and home laptop.  I made a new library on my home laptop, and moved the .enl file inside the .data folder.  I copied the .data folder onto an external hard drive and transferred to my work desktop.  When I tried to open the .enl file, I got an error message that says “Are you sure you would like to continue opening the library without the associated .data folder?”.  If I click “OK” the library opens but it is completely empty.  I’m not sure what to do since I do have the .data folder.  Please help!