Unable to import my data through plaintext protocol

Hello.

I am trying to send data in plaintext format, but unfortunatelly the data is not displayed in the Graphite web interface.
I able to send data using nc command from the same machine and the data succesfully displayed, so there is no connectivity problem.
Here is the result of capturing data that I send by tcpdump (sudo tcpdump -A port 2003) on the machine where Graphite is installed:

18:12:11.421286 IP 192.168.0.102.62707 > 192.168.0.103.cfinger: Flags [P.], seq 2451:2639, ack 1, win 16425, length 188
E...qt@........f...g............P.@)y...h1.example.stopwatch.min 29925659 1396797131419
h1.example.stopwatch.max 483953041 1396797131419
h1.example.stopwatch.active 0 1396797131419
h1.example.stopwatch.maxActive 0 1396797131419

18:12:11.421299 IP 192.168.0.103.cfinger > 192.168.0.102.62707: Flags [.], ack 2639, win 330, length 0
E..(..@.@......g...f............P..J.8..
18:12:11.421656 IP 192.168.0.102.62708 > 192.168.0.103.cfinger: Flags [P.], seq 2451:2638, ack 1, win 16425, length 187
E...qu@........f...g....7z.4.A..P.@)....h2.example.stopwatch.min 6012377 1396797131419
h2.example.stopwatch.max 670135455 1396797131419
h2.example.stopwatch.active 0 1396797131419
h2.example.stopwatch.maxActive 0 1396797131419

I can see pathes in the Graphite tree that corresponds to the sent data, but when I try to display some values I see "No Data" instead of a graph and for other values I simply see empty graph (I tried to display the data for the last 2 minues, but it didn't help).

What can be a source of the problem?
Can it be encodding?
Is it ok that I never close a connection to a Graphite server while I send my data?

I am using Graphite 0.9.10 on Ubuntu 12.04.

Best regards,
Ivan.