ServerlessError is not authorized to perform... how to solve?

[i2801]

$ npm run deploy

wire-o@0.0.0 deploy /Users/xxx/Documents/www/node/wire-o
babel lib --out-dir dist && serverless deploy

lib/app.js -> dist/app.js
lib/download.js -> dist/download.js
lib/downloadPdfs.js -> dist/downloadPdfs.js
lib/formatResponse.js -> dist/formatResponse.js
lib/mergePdfs.js -> dist/mergePdfs.js
lib/storePdf.js -> dist/storePdf.js
lib/tmpDirectory.js -> dist/tmpDirectory.js
lib/uploadToS3.js -> dist/uploadToS3.js

Error --------------------------------------------------

 ServerlessError: ServerlessError: User: arn:aws:iam::XXX:user/mscore
 is not authorized to perform: cloudformation:DescribeStackResources
 on resource: arn:aws:cloudformation:us-east-1:XXX:stack/wire-o-dev/*

 For debugging logs, run again after setting the "SLS_DEBUG=*" environment variable.

Get Support --------------------------------------------
Docs: docs.serverless.com
Bugs: github.com/serverless/serverless/issues
Forums: forum.serverless.com
Chat: gitter.im/serverless/serverless

Your Environment Information -----------------------------
OS: darwin
Node Version: 6.9.5
Serverless Version: 1.11.0
...

[i2801]

IAM > AdministratorAccess added. success. thank you.