problem opening of ladder lagic

Dear Sir,

• Opening S7 program is no problem.After opening Ladder logic(block) that is showing

LAD/STL/BD(30:503) There are no parameter and local varibles

names aviliable because their descrition is

not aviliable cannot be assigned.

• After press "OK" option, showing another error

OPEN OBJECT (256:26) An Internal OLE error occurred.

• I was Installed first time in my computer and first time opening ladder logic(ladder logic i copy from another computer,but ladder logic functioning with another computer "good") .my computer WindowsXP operating system and 1GB RAM.
• i am waiting for your best solution, Thanks