.nettiers array index out of bound.

I used .nettiers in my professional project. But i found some problems in .nettiers. The one is array index out of bound.

The three common method of .nettiers GetByID, GetAll, Find has generate the above error when no of hit in my site increase. After restating iis it should be ok. But its not a solution. I remove all of three methods by my own methods & now its ok.