Canadian Immigrant Difficulties

I am a Canadian Immigrant since 2004, July. I spend one month in Canada and return back to India due to some family circumstances. Now, i want to return back to Canada. What are the difficulties that I have to face? Can I re-enter Canada and maintain my permanent residency status? My PR is valid till Sep,2009

To maintain permanent residence status, you must be physically present in Canada for 730 days- not counting days of travel when you left country- in a 5 year period.

If not, you are likely to lose it.