saving the assy!!!!!!!!!!!!!

Dear Frnz,

                I have an assembly comprising of around 10 sub assemblies and over 200 components.

issues are as follows

1. I open the assembly and add an new component and try to save the assembly ,the assembly doesn't get saved with the added new component.

2. I just try to save the assembly as "save as" and locate a destination it doesn't save in the particular location.

3. In the explorer i can copy that assy and rename the assy,but again i open the renamed assy and add a component and try to save the assy file, it doesn't get saved with the added new component.

Just wanna know what the problem might be................

SolidworksAssemblies