Deleting LockPermissions problem, need help (Network lockpermission problem)

I am having a problem with deleting rows from the LockPermissions table.

We are setting fullrights to EveryOne on one of our folders.
The user can select where the folder shoudl be.
If the user selects a network path then there is an error message.

I have tried to implement the following workaround:
Delete all rows from LockPermissions

<--- Code start --->
function DeleteRightsIfOnNetwork(hMSI)
NUMBER result;
HWND hDB, hViewlist, hResult,hRec;
begin
try
result=PathIsNetworkPath(TARGETDIR);
catch
endcatch;

if result!=0 then

// Is network drive
hDB = MsiGetActiveDatabase(hMSI);
//hResult=MsiDatabaseOpenView(hDB,"SELECT * FROM `LockPermissions` WHERE `User`='EveryOne'",hViewlist);
hResult=MsiDatabaseOpenView(hDB,"SELECT * FROM `LockPermissions`",hViewlist);
if hResult==ERROR_SUCCESS then
hResult=MsiViewExecute(hViewlist, NULL);
if hResult!=ERROR_SUCCESS then
MessageBox ("Error executing!!", INFORMATION);
endif;

while (MsiViewFetch(hViewlist, hRec) == ERROR_SUCCESS)
hResult = MsiViewModify(hViewlist, MSIMODIFY_VALIDATE_DELETE, hRec);
if (hResult!=ERROR_SUCCESS) then
MessageBox ("Error verifying!!", INFORMATION);
endif;


hResult = MsiViewModify(hViewlist, MSIMODIFY_DELETE, hRec);
if (hResult!=ERROR_SUCCESS) then
MessageBox ("Error deleting!!", INFORMATION);
endif;
endwhile;

else
if hResult==ERROR_BAD_QUERY_SYNTAX then
MessageBox ( "Bad Syntax!!", INFORMATION);
endif;
//
endif;
//MsiDatabaseOpenView(
endif;
end;
<--- Code end--->

And there are no errors when executing this.

The error is now replaced with a new error message:

"An error occurred while applying security settings.
Windows\ is not a valid user or group. This could be a problem with the package,
or a proble connecting to a domain controller on the network."

I feel like I am close to a solution, does anyone have any input to offer?