I use `xshell` to SSH to a Linux remote server—running Red Hat Enterprise Linux AS release 4 (Nahant Update 3)—without root. There aren’t any problems to use `sz`, `rz` to transform my files until I start `tmux`. When I type `rz`, the info will shows as follows:

```
rz waiting to receive. B0100000023be50

```

And I can’t do anything at all unless I exit `tmux`. The situation about `sz` is similar with `rz`,the info is:

```
B00000000000000*

```

And I can’t do anything unless I exit `tmux`, too.

Software versions are:

* **tmux:** 1.8 (default config)
* **szsz (lrzsz):** 0.12.20
* **rzrz (lrzsz):** 0.12.20