Odd packet header

[DeathArt]

Each line represents the first 10 bytes in each packet. After this the filename is sent.

2B 00 19 D3 00 00 00 22 00 00
25 00 87 CF 00 00 82 00 00 00
2B 00 1E D3 00 00 61 F4 00 00
2B 00 1B D3 00 00 9D 98 07 00
2B 00 1C D3 00 00 BC 20 00 00
28 00 1D D3 00 00 64 74 02 00

Anyone got an idea why the first header don't seems to fit in ?

I assumed it was structured this way:

Header (byte)                         
0x00                                  
Filesize (int)                        
0x00                                  
Filename-Length (ushort)       
0x00                                  
Filename (string)

But the types don't fit due to the first packet :S

Sample data

0000  2B 00 19 D3 00 00 00 22 00 00 44 61 74 61 5C 4E    +......"..Data\N
0010  70 63 5C 43 6C 6F 74 68 65 73 5C 54 65 78 5C 4E    pc\Clothes\Tex\N
0020  30 33 33 5F 30 32 2E 47 54 58 00 1F 8B 08 00 B4    033_02.GTX......

0000  2B 00 1A D3 00 00 5E 20 00 00 44 61 74 61 5C 4E    +.....^ ..Data\N
0010  70 63 5C 43 6C 6F 74 68 65 73 5C 54 65 78 5C 4E    pc\Clothes\Tex\N
0020  30 33 33 5F 30 33 2E 47 54 58 00 1F 8B 08 00 B4    033_03.GTX......