Xref Layers do not retain their settings in a Viewport

[csiress]

Within AutoCAD 2005 and '06, I have this drawing which when I go into the view port and freeze or turn off certain layers, they'll reappear when I reopen the drawing. The layers are part of an xref, if that matters.
Kinda sounds like a specific setting, though.
Does anyone know how to fix this?

Thank you.
Craig II
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[rkmcswain]

Explore the VISRETAIN system variable.