Also looking at your original caspol statement, if you are accessing the document from this document then it fail as there is no trust for it.
Regards,
Darryn Lavery [MSFT]
Level = Enterprise
Code Groups:
1. All code: FullTrust
1.1. Url - http://voyager/MedkineticsDocumentPortal/*: Nothing
1.1.1. StrongName - 00240000048000009400000006020000002400005253413100040
000010001003941B27B58B403622F1422383BA366F59E3124DE989E82DB207A6F9C3D014306EAB67
1E9F21B2DB612C2658E8CE9B6D6FBBD4D15352553D48A40C7BBA45375824A27A2AD3DFC2BB940279
F09968C77851B806272DD328B41EC14372DB2F704E229D60328F83B5DC78B2228080777B4FCDAD0A
3CD0030CFDC32BADCB65C1534CC: FullTrust (LevelFinal)