Question: Problem with code calculation in Maple 17

Maple_17_fault.mwA piece of code presented in attached file can be easily calculated with Maple 13 and ancient (Pentium M) laptop. While Maple 17 and modern PC with Core i7 3770K and 32GB RAM on board unable to do the same. What's wrong? Do I need to make some settings of Maple 17? Can I install Maple 13 and Maple 17 on the same PC? Will not any conflicts occur? Thank you.
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