Error linking multi-level linked files

I have been trying to work with multiple Mathcad files in version 8.0. While doing so, there are crashes when trying to link files files which are already linked with some other files. At times these kind of files work but there are crashes randomly. I also tried to turn off the cache worksheet option so that I want Mathcad to update the sheet whenever I am opening the file. Another problem is that some times sheets do not get updated so I need to press ctrl + F9 to relink the values. I am current user of Mathcad 7.0 which had the same issue so I am trying out in Mathcad 8.0 trial as of now but no luck.