Indesign keeps freezing and saying it is unresponsive. Here is the link to the crash report and sample indesign. crash report - Pastebin.com
sample indesign - Pastebin.com
First thing you need to do is update to 7.5.3, which is the final patch for CS5.5.
Then, the problems seems to be related to SING, so see SING Removal
First things first. Help>updates and patch InDesign
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