FTP error - 425 cannot open data connection

Hej, jeg har følgende problem.

Fra min webapp som kører på en ii7 webserver kan jeg ikke downloade filer fra min eksterne ftp server. Men hvis jeg remoter til min webserver, så kan jeg godt manuelt downloade filer fra min eksterne ftp server.

Nogen som ved hvad der går galt? :(

Her er fejl-loggen:

11/10/24 09:57:15, 4004, xxx.xxx.xxx.xxx, xx-test, 331 Password required for eml-test.
11/10/24 09:57:15, 4004, xxx.xxx.xxx.xxx, xx-test, PASS ****
11/10/24 09:57:15, 4004, xxx.xxx.xxx.xxx, xx-test, logged in as "xx-test".
11/10/24 09:57:15, 4004, xxx.xxx.xxx.xxx, xx-test, 230 User xx-test logged in.
11/10/24 09:57:15, 4004, xxx.xxx.xxx.xxx, xx-test, TYPE I
11/10/24 09:57:15, 4004, xxx.xxx.xxx.xxx, xx-test, 200 Type set to I.
11/10/24 09:57:15, 4004, xxx.xxx.xxx.xxx, xx-test, SIZE /xx/xxxx.mov
11/10/24 09:57:15, 4004, xxx.xxx.xxx.xxx, xx-test, 213 8785048
11/10/24 09:57:15, 4004, xxx.xxx.xxx.xxx, xx-test, EPSV
11/10/24 09:57:15, 4004, xxx.xxx.xxx.xxx, xx-test, 229 Entering Extended Passive Mode (|||56059|)
11/10/24 09:57:15, 4004, xxx.xxx.xxx.xxx, xx-test, RETR /xx/xxxx.mov
11/10/24 09:57:15, 4004, xxx.xxx.xxx.xxx, xx-test, asked to download '/xx/xxxx' -> 'C:\FTP\xx-test\xx\xxxx' from 0 --> Access allowed.
11/10/24 09:57:33, 4002, xxx.xxx.xxx.xxx, xx-test, 425 Cannot open data connection.
11/10/24 09:57:33, 4002, xxx.xxx.xxx.xxx, xx-test, disconnected. (00d00:00:30)
11/10/24 09:57:45, 4004, xxx.xxx.xxx.xxx, xx-test, 425 Cannot open data connection.
11/10/24 09:57:45, 4004, xxx.xxx.xxx.xxx, xx-test, disconnected. (00d00:00:30)