Download MSCAL.ZIP file from http://www.gmayor.com
Unzip the file and put the correct versionof mscal.ocx into the correct location on your computer.
For Windows 95, 98 and ME - C:\Windows\System
For Windows NT, 2000, XP - C:\Windows\System32
For Windows7 32bit - C:\Windows\System32
For Windows7 64bit - C:\Windows\SysWow64
Click Start then Run and type: regsvr32 mscal.ocx to register the file.
Thanks http://www.gmayor.com