Summary
The Laserfiche Repository Access Web Part may not function with your 64 bit version of Microsoft SharePoint. By default, the Web Part installation does not include the 64 bit version of LFSO80.dll and its dependent files.
Workaround 1
Please contact Laserfiche Technical Support.
Workaround 2
Install the Laserfiche Server on the computer hosting the Web Part. The Laserfiche Server installation automatically installs the necessary 64 bit components when it detects that the machine is running a 64 bit operating system.