No service via FTP

Hello!

Our clients are facing some problems with connecting to our FTP from Ukraine.

In the US we cannot replicate the problem, everything is OK.

Please find the log trace:
Host Loss% Snt Last Avg Best Wrst StDev
1. ****
2. kiev-nt-b1-ae5-vlan3103.fiord.ne 0.0% 160 0.7 3.2 0.4 32.2 6.9
3. frankfurt-anc-b1-xe0-0-2-vlan204 0.0% 160 30.9 31.3 30.3 61.4 2.9
4. ffm-b1-link.telia.net 0.0% 160 31.2 31.5 30.4 52.4 2.2
5. ffm-bb3-link.telia.net 0.0% 160 34.5 34.5 34.0 35.4 0.0
6. ash-bb4-link.telia.net 0.0% 160 126.9 127.3 126.4 153.6 2.4
7. ash-b1-link.telia.net 0.0% 160 128.4 129.1 128.4 130.9 0.3
8. comcast-ic-318834-ash-b1.c.telia 0.0% 160 126.2 126.3 125.5 126.8 0.0
9. hu-2-3-0-0-cr02.ashburn.va.ibone 0.0% 160 125.6 126.1 124.8 128.2 0.4
10. et-15-0-1-0-ar01.capitolhghts.md 0.0% 160 127.4 128.9 127.0 215.9 9.2
11. ae-0-0-sur01.frederick.md.bad.co 0.0% 160 126.3 127.5 125.7 169.5 4.8
12. te-6-1-acr02.frederick.md.bad.co 0.0% 160 125.9 125.9 125.3 130.2 0.3
13. c-76-100-211-81.hsd1.md.comcast. 76.1% 160 138.6 139.5 137.6 146.5 1.7
14.  ****

Please resolve this.

BR, Pavel