That depends if your minecraft server is vanilla, or with plugins, if it is with plugins like PermissionsEX then yo.u have to add the 'modifyworld' permission to the users permissions
You can ask the server admin to give you permissions to build on your plot depending on the plugin of creative plots they have.
The spawn area in a server is protected. (A radius of 33 blocks). Have them move more than 33 blocks away from the spawn point, and then they will be able to build.
Check with a server mod or server owner about the faction mod he/she uses
someone let me know please
either you don't have An internet connection or you have a cracked account on minecraft and it wont let you on. The alternative to this is their minecraft server was having issues.
Nopa.avi.
See the related link for the Minecraft forum.
They should be able to move without oping them natively. they might just be lying to get op or their glitched/stuck.
It depends how the server is set up. The owner of the server can change the size of the server to let more or less people join.
it is :25565 dont forget the : because it wont let you join with out it.
That is probably because you do not have any other people on the server. To let other people onto a server you need to give them your server ip.
You need to wait for their server to be updated to 1.3 too.