PRTG EXE/Script Advanced Sensor return 0

Hi,

I have simple CMD script to read some OIDs form printer: total capacity, print pages left and drum unit. If I run cmd script from command line everything is fine: correct echo values and correct XML value. When I add EXE/Script Advanced to PRTG it returns "0" values. What is wrong? Where I made mistake?

Script:

@echo off

::READ Total toner capacity
for /f "tokens=2,2 delims==" %%a in ('SnmpGet.exe -r:XX.XX.X.XX -t:10 -c:public -o:1.3.6.1.2.1.43.11.1.1.8.1.1 ^| find /i "Value="') do (set totaltonercapacity=%%a)
echo %totaltonercapacity%

:: READ Print pages left
for /f "tokens=2,2 delims==" %%b in ('SnmpGet.exe -r:XX.XX.X.XX -t:10 -c:public -o:1.3.6.1.2.1.43.11.1.1.9.1.1 ^| find /i "Value="') do (set printpragesleft=%%b)
echo %printpragesleft%

::READ Drum unit
for /f "tokens=2,2 delims==" %%c in ('SnmpGet.exe -r:XX.XX.X.XX -t:10 -c:public -o:1.3.6.1.2.1.43.11.1.1.9.1.14 ^| find /i "Value="') do (set drumunit=%%c)
echo %drumunit%

set /A percent = %printpragesleft%*100/%totaltonercapacity%
echo %percent%


echo ^<?xml version="1.0" encoding="Windows-1252" ?^>
echo ^<prtg^>
echo    ^<result^>
echo        ^<channel^>Black^</channel^>
echo        ^<value^>%percent%^</value^>
echo        ^<unit^>%^</unit^>
echo        ^<float^>1^</float^>
echo		^<limitmode^>1</limitmode^>
echo        ^<LimitMinError^>15^</LimitMinError^>
echo        ^<LimitMinWarning^>5^</LimitMinWarning^>
echo        ^<LimitWarningMsg^>To low^</LimitWarningMsg^>
echo        ^<LimitErrorMsg^>End of toner^</LimitErrorMsg^>
echo        ^<LimitMode^>1^</LimitMode^>
echo    ^</result^>
echo    ^<text^>%percent%^</text^>
echo ^</prtg^>

Below output result from command line. Four values (1200, 1020, 100, 85) - results from CMD script:

C:\Program Files (x86)\PRTG Network Monitor\Custom Sensors\EXEXML>B235-1_toner_drum.cmd
1200
1020
100
85
<?xml version="1.0" encoding="Windows-1252" ?>
<prtg>
   <result>
       <channel>Black</channel>
       <value>85</value>
       <unit></unit>
       <float>1</float>
The filename, directory name, or volume label syntax is incorrect.
       <LimitMinError>15</LimitMinError>
       <LimitMinWarning>5</LimitMinWarning>
       <LimitWarningMsg>Malo tonera</LimitWarningMsg>
       <LimitErrorMsg>Toner na wykonczeniu</LimitErrorMsg>
       <LimitMode>1</LimitMode>
   </result>
   <text>85</text>
</prtg>
C:\Program Files (x86)\PRTG Network Monitor\Custom Sensors\EXEXML>

http://promanski.info/public/prtg_cmd.PNG |CMD Output
http://promanski.info/public/prtg_error.PNG |PRTG Output