Array Formula not displaying results

[pluginguin]

Please check out my Excel Range.
The Array Formula should copy all ItemCodes from Sheet 1 to Sheet 2, where "Below Stocklevel" value = 1.
But somehow it's doesn't do anything. What am I missing?

This is the source table: (Sheet1)

ItemCode	Below StockLevel
1300011​	0​
130021​	0​
130022​	0​
130023​	0​
130024​	0​
130025​	0​
300031​	0​
300101​	0​
300102​	1​
300103​	0​
300104​	0​
300141​	1​
300142​	0​
300143​	1​

And this is the result table (sheet2) with the array formula

ItemCode

{=IF.ERROR(INDEX(Sheet1!A$2:A$15;SMALL(IF(B$2:B$15=1;ROW(A$2:A$15));ROW(1:1))-1;1);"")}

I expect to see the values 300102 and 300143 but in stead I see nothing.

 

[Fluff]

Glad it's sorted & thanks for the feedback.