No, the application is not compatible with Windows 7 64bit because it has been discontinued. There is no download available, website, or a resources to access in order to obtain a version for Windows 7 64bit. I have tried getting one, but all links point to the official website, which is actually discontinued as well. You will have to use other calling applications that are still available for download and usage.
Visit the database of Software Informer to look for other applications of the same type: http://software.informer.com/search/caller