Problems with solana CLI

General
#1

I have a problem with Solana CLI,i created my wallet with solana CLI, but when i like to transfer, know the amount of SOL or deploy i have this error

“Dynamic program error: No default signer found, run “solana-keygen new -o my-keypair.json” to create a new one”

Someone who can help me please?

#2

@ are you still getting the error message?

#3

yep and i don´t know why u.u