Fail to start OS when OS selector installed

i have installed disk director 10 and OS selector is active.some times when i boot my computer i got these errors "No boot device press enter to reboot" or "There is no OS selector Configuration file,press enter to reboot".Why?
after reactivating of OS selector i do not get this errors but after while i got them agian.
MY os is Windows XP and i use True Image 9.0 With Secure zone.my drives file system is NTFS.

 

Hello Shahin,

Thank you for choosing Acronis Partition and Disk Managing Software.

Please create Acronis Report and Windows System Information as it is described in Acronis Help Post.

Please create an account, then log in and submit a request for technical support. Attach all the collected files and information to your request along with the step-by-step description of the actions taken before the problem appears and the link to this thread.

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Thank you.
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Kirill Omelchenko