problem sending smpp-tlv

hello! I use cvs meta-data branch of kannel and defined TLV in
kannel.conf like this:

group = smpp-tlv
name = its-session-info
tag = 0x1383
type = octetstring
length = 2

When I send for example TLV value 0x0101 it looks OK:

2008-11-17 18:31:10 [950] [8] DEBUG: new group created `smpp'
2008-11-17 18:31:10 [950] [8] DEBUG: group=`smpp' key=`its-session-info' value=`'
2008-11-17 18:31:10 [950] [8] DEBUG: SMPP[ussd]: Sending PDU:
....
2008-11-17 18:31:10 [950] [8] DEBUG:   its-session-info:
2008-11-17 18:31:10 [950] [8] DEBUG:    Octet string at 0x93185c0:
2008-11-17 18:31:10 [950] [8] DEBUG:      len:  2
2008-11-17 18:31:10 [950] [8] DEBUG:      size: 3
2008-11-17 18:31:10 [950] [8] DEBUG:      immutable: 0
2008-11-17 18:31:10 [950] [8] DEBUG:      data: 01 01                                             ..
2008-11-17 18:31:10 [950] [8] DEBUG:    Octet string dump ends.
2008-11-17 18:31:10 [950] [8] DEBUG: SMPP PDU dump ends.

But when I try to send value 0x0001 it seems that TLV ignored because
there is leading zero character:

2008-11-17 18:45:11 [950] [8] DEBUG: group=`smpp' key=`its-session-info' value=`'
2008-11-17 18:45:11 [950] [8] DEBUG: SMPP[ussd]: Sending PDU:
2008-11-17 18:45:11 [950] [8] DEBUG: SMPP PDU 0x9339428 dump:
....
2008-11-17 18:45:11 [950] [8] DEBUG:   its-session-info: ""
2008-11-17 18:45:11 [950] [8] DEBUG: SMPP PDU dump ends.

this is part of my GET-request:
&meta-data=%3Fsmpp%3Fits-session-info%3D%00%01

How should I send this two-byte hex value (0x0001)?

And if I try to send 0x010002:
2008-11-17 18:51:04 [950] [8] DEBUG:   its-session-info:
2008-11-17 18:51:04 [950] [8] DEBUG:    Octet string at 0x93104e0:
2008-11-17 18:51:04 [950] [8] DEBUG:      len:  1
2008-11-17 18:51:04 [950] [8] DEBUG:      size: 2
2008-11-17 18:51:04 [950] [8] DEBUG:      immutable: 0
2008-11-17 18:51:04 [950] [8] DEBUG:      data: 01                                                .
2008-11-17 18:51:04 [950] [8] DEBUG:    Octet string dump ends.

thanks.