I can not send XRP

[Nildo77]

Hello, I'm a new enthusiast in this ripple universe, I'm an apprentice and I need the help of my friends to follow, let's go to the problem:

I downloaded and installed the wallet on my desktop, create the account normally as suggested even with the Regular Key

I transferred the sufucuente balance to activate and remain with balance for shipments, until the moment everything ok
Then the time has come to send XRP and I can not do it because my wallet displays the message, (This regular-key wallet is invalid.) You may browse this account but can not execute transactions.

summarizing I can not send XRP

please friends can help me with this inconvenience? thankful

[Tonnie]

Which wallet do u use?

[Nildo77]

Desktop wallet v 1.4.1

[Nildo77]